Printer moves to X_MAX_POS, Y_MAX_POS after stowing allen key probe (no replies)

I have a custom CoreXY printer that I am configuring Marlin 2.0.9.1 for. After the bed levelling is done, the probe is stowed correctly, but after that, the toolehad moves to X_MAX_POS, Y_MAX_POS instead of staying at the stow position. The only stow moves are these:

  #define Z_PROBE_ALLEN_KEY_STOW_1 { X_MAX_POS, 100.0, 20.0 } // Move the probe into position
  #define Z_PROBE_ALLEN_KEY_STOW_1_FEEDRATE XY_PROBE_FEEDRATE

  #define Z_PROBE_ALLEN_KEY_STOW_2 { X_MAX_POS, 100.0, Z_MIN_POS } // Push it down
  #define Z_PROBE_ALLEN_KEY_STOW_2_FEEDRATE (XY_PROBE_FEEDRATE)/10

  #define Z_PROBE_ALLEN_KEY_STOW_3 { X_MAX_POS, 100.0, 20.0 } // Move it up to clear
  #define Z_PROBE_ALLEN_KEY_STOW_3_FEEDRATE XY_PROBE_FEEDRATE

There is not following gcode, or any comands whatsoever. The printer does this on its own.

I am pretty sure this is not a bug but a configuration problem, but I cannot find the relevant setting that would disable this behavior. In the text editor I even searched for X_MAX_POS and Y_MAX_POS and did not find them anywhere they would not belong.

Any ideas would be greatly appreciated.